<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Document</title>
		<style>
			* {
				padding: 0;
				margin: 0;
			}
			body,
			html {
				width: 100%;
				height: 100%;
			}

			.header {
				display: block;
				width: fit-content;
				margin: 0 auto;
			}

			.container {
				width: 100vw;
				height: 38.96vw;
				background: url("./banner.jpeg") center center/100% 100%
					no-repeat;
			}
		</style>
	</head>
	<body>
		<header class="header">这是标题</header>
		<div class="container"></div>
	</body>
</html>
